Hoisting mechanism.



G. LAUGHRIN. HoIsTING MGHANISM.

- APPLICATION FILED JUNE 7, 1913.

1,093,707. Patented Apr.'21, 1914 2 SHEETS-SHEET 1.

G. LAUGHRIN.

HOISTING MEGHANISM.

APPLoATIoN FILED JUNE 7, 191s.

1,09 3,1707. Patented Apr. 21, 1914,

1 L NH T I wo t;

COLUMBIA PLANOURAPH C0., WASHINOTBN, D, C.

GEORGE LAUGI'IRIN, OF SAVANNA, ILLINOIS.

I-IOISIING MECHANISM.

Specification of Letters Patent.

Patented Apr. 21, 1914.

Application filed June 7, 1913. Serial No. 772,437.

To all 'Lo/0m it may concern.'

Be it known that I, Groen Lauer-nun, a citizen of the United States,residing at Savanna, in the co-unty of Carroll and State of Illinois,have invented certain new and useful Improvements in Hoisting Mechanism,of which the following is a specification.

My invention relates to hoisting` mechanism especially adapted for usein loading and unloading vehicles.

One object of the invention is to provide a device of this kind that maybe easily and effectively operated manually.

Another object of the invention is to provide means whereby the partswill automatically lock in adjusted positions upon elevation of the loadthereon.

A further object of the invention is to pro-` vide the device of suchconstruction that a plurality of independently operable units betweenwhich a vehicle may pass, are employed, which units are adapted formanual operation one at a time so that the load may be raised or loweredas the case may be, by degrees.

The invention resides in the novel arrangement and combination of theseveral elements presented in the preferred embodi ment of the inventionillustrated in the accompanying drawings.

In said drawings z-Figure 1 is a perspective view; and Fig. 2 is a sideelevation, showing the parts in lowermost position.

Throughout the several views of the draw ings, like reference charactersdesignate like or similar parts.

In practice, two of the devices are preferably employed and arranged sothat a wagon or other vehicle may pass between them. Such an arrangementis shown in Fig. 1 and the two devices are generally designated A and B.Inasmuch as each of these devices is similar in construction, only oneof them will be specifically described.

Referring specifically to the drawings, l

- designates supporting members in the nature of posts which may bedriven into the ground, as shown. Adjacent the upper end of cach post asby means of bolts 2, are pivoted levers 3 and 4. At one end of levers 3and 4 as by means of bolts 5, are pivoted load supporting members in theform of longitudinal beams or bars 6. At their other ends the levers 3and 4 are pivotally connected by bolts at 7 to a connecting bar or beam8. On one of the bolts 7 is pivoted an operating lever designated 9, andfastened thereon in any suitable manner is a bracket 10 to which ispivotally connected a link 11 in turn pivotally connected as at 12 tothe lever 4. To said operating lever 9 as at 13 is pivotally connected asecond link 14 connected'to a coil spring 15, which spring is connectedto a link 16 pivoted as at 17 to the lever 3. Coil spring 15 through itsconnection with the levers 3 and 4 by means of the links 14 and 16,tends to normally move or pull said parts toward each other. Onconnecting bar 8 is suitably fastened a block or supporting member 18having fastened thereto a bracket 19 affording an elongated slot throughwhich the link 14 passes and by means of which it is guided.

Lever 4 is provided with a plurality of teeth at 20 which providebetween them suitable notches with which may engage a pawl 21 pivoted bya pawl at 22 to the supporting beam 6. The teeth 20 are preferablyformed by providing walls extending transversely of the lever 4, and bywalls such as 23 arranged at an angle to said transverse walls. By meansof this construction, when the parts are elevated, as will be more par-Vticularly set forth hereinafter, the pawl will readily slip over theteeth and engage the proper notches at the proper times. A coil spring24 is preferably connected to the lever4 and pawl 21 serving to normallydraw said pawl toward said lever to normally maintain it in engagementwith the proper notch. Suitably fastened to the bar 6 is an abutmentblock designated 25 which is adapted to bear against one side face ofthe adjacent post 2 when the parts are in highest position to thus serveas a brace to prevent collapsing of the parts to lowermost position.

Suitable brackets such as 2,6 are preferably suspended from thesupporting beams 6 and in transverse alinement adjacent opposite ends sothat any desired beams or the like may be passed therethrough so as toeX- tend transversely of the devices.

In use, a vehicle such as a hay wagon, is adapted to pass between thedevices A and B, and while halted in such position the devices suitablyoperate to remove the load therefrom. The hay rack is adapted to eX-tend laterally beyond the beam 6, and thus when the beams are elevated,to be supported thereby. When the wagon is thus located,

the operating levers 9, one at a time, are depressed, which depressingaction through the medium of the levers 3 and 1l shifts the loadsupporting member vertically and causes the same to engage and lift theload. During such lifting action the pawl 2l rides over the proper teeth20 and falls automatically into the proper notch, assisted in thisaction by the spring Q4. After one of the devices is thus lifted to someextent, the other one is likewise lifted, and so on in this manner untilt-he load has vbeen lifted to the proper height. When the loadsupporting members 6 are in uppermost position, the levers 3 and l willbe vertical and in this position the abutmentrmembers 25 are adapted toabut or bear against the proper post l and in conjunction withthe pawl2l be effectively supported and braced. Of course, in the lowering of aload, the operation of the parts is just the reverse. llVhile loweringthe parts the pawl 21 may be held manually out of engagement with thenotches at teeth 2O in order to permit the proper d escent of thelevers. `With a device of this kind I have found .that very slightleverage is necessary to effect velevation of the load, and in con`neetion with the hay rack as just described, have found that the levercan be successfully operated with one hand. In the lowermost position ofthe parts as best illustrated in Fig. 2, the supporting beams (i restupon the upper ends of the post l. In this Fig. 2 the load is also shownin dotted lines, and for the sake ofi/convenience, is designated 27.Should it be found that the load was of insufficient width as to beengaged by the supporting beams G, cross bars as previously stated, maybe passed through the brackets 2G. The load to be delivered onto thesecross bars must of course, be suitably located and positioned on thevehicle carrying the same, passing between the devices A. and B.

Inasmueh as merelythe preferred embodiment of the invention has beenillustrated and described, changes such as fall within the spiritandscope of the appended claims are reserved.

Having thus described my said invention, what I claim as new and desireto secure by Letters Patent is l. In a hoisting mechanism, a supportingmember, levers pivoted thereto, means connecting said levers, one ofsaid levers provided with a plurality of notches and means engaging saidnotches for holding said supporting member in adjusted position, anoperating lever and means connecting said operating lever with each ofsaid first mentioned levers.

2. In a hoisting mechanism, a supporting member, first and second leverspivoted thereto, a connecting member pivoted to said levers, said firstlever provided with a plurality of notches, a pawl engageable with saidnotches, an operating member, and a spring fastened to said operatingmember and said second lever.

3. In a hoisting mechanism, ay supporting member, posts, first andsecond levers pivoted to said posts and to said supporting member,aconnecting` member pivoted to said levers, said first lever providedwith a plurality of notches, a pawl engageable with said notches, meansto normally maintain said pawl in engagement with said notch, anoperating lever, a link fastened to said operating lever and said firstlever and a spring fastened to said operating lever and said secondlever.

4. In a hoist-ing mechanism, a supporting member, posts, first andsecond levers piv oted to said posts and to said supporting member, aconnecting member pivoted to said levers, said first lever provided witha plurality of notches, a pawl pivoted to said supporting memberengageable with said notches, a spring to normally maintain said pawl inengagement with the proper notch, an operating lever connected to saidfirst lever, a link fastened to said operating lever and said firstlever, and a coil spring fastened to said operating lever and saidsecond lever.

5. In a hoisting mechanism, a supporting member, posts, first and secondlevers pivoted to said posts and to said supporting member, a connectingmember pivoted to said levers, said first lever provided with aplurality of notches, a pawl pivoted to said supporting memberengageable with said notches, a spring secured to said first lever andsaid pawl to normally maintain said pawl in engagement with the propernotch, an operating lever connected to said first lever, a link fastenedto said operating lever and said first lever, a coil spring fastened tosaid operating lever and said second lever, supporting means for saidcoil spring secured to said connecting member and an abutment membersecured to said supporting member and adapted to engage said posts forrigidly holding said supporting member in adjusted position.

In testimony whereof I afiix my signature in presence of two witnesses.

GEORGE LAUGIIRIN.

I'Vitnesses ARTHUR J. GRAY,

IVM. G. Law.

Copies of 'this patent may be obtained for ve cents each, by addressingthv Commissioner of Patents. Washington, D. C.

